- Companies
- Civil engineering
- Mountain Ash
- Marton (Civil Engineering) Limited
Marton (Civil Engineering) Limited
- Company number
- 01276520
- Incorporated
- 9 Sep 197650 years trading
- Registered office
- Ty Cynon Navigation Park, Abercynon, Mountain Ash, Mid Glamorgan, CF45 4SN
- Nature of business
- Construction of roads and motorways; Construction of bridges and tunnels; Construction of water projects; Construction of other civil engineering projects n.e.c.
Marton (Civil Engineering) Limited is a 50-year-old private limited company registered in Mountain Ash, company number 01276520, one of 12 civil engineering contractors in Mountain Ash. Its next accounts are due at Companies House on 31 January 2027, and the CT600 for the period to 30 April 2026 is due at HMRC on 30 April 2027.
Key dates
Worked out from the year end and filing history on the Companies House register.
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Finances
From each year's balance sheet filed at Companies House. Small companies do not have to publish turnover or profit, so these are balance sheet figures.
- Net assets up £116K (+112%) on the year before, to £219K.
- Net assets rose in 7 of 9 year-on-year comparisons on record.
- Current assets of £673K against £473K owed within a year: 1.4 times cover.
- 10 employees on average during the year.
- Balance sheets on record for 10 years, 2016 to 2025.
Net assets by year
| Year end | Net assets | Cash | Current assets | Owed within a year | Employees |
|---|---|---|---|---|---|
| 30 Apr 2025 | £219K | £662K | £673K | £473K | 10 |
| 30 Apr 2024 | £103K | £191K | £100K | 10 | |
| 30 Apr 2023 | £168K | £258K | £84K | 10 | |
| 30 Apr 2022 | £185K | £315K | £144K | 10 | |
| 30 Apr 2021 | £104K | £250K | £149K | 10 | |
| 30 Apr 2020 | £40K | £167K | £131K | 10 | |
| 30 Apr 2019 | £3,596 | £49K | £108K | £108K | |
| 30 Apr 2018 | £1,163 | £1,200 | £118K | £119K | |
| 30 Apr 2017 | £590 | £1,300 | £172K | £171K | |
| 30 Apr 2016 | -£38K | £1,300 | £115K | £161K |
Who runs and owns Marton (Civil Engineering) Limited
From the Companies House register. Individuals are shown by initials only; the full register is on Companies House.
Officers (3)
| Name | Role | Appointed |
|---|---|---|
| H*** G*** | Director | Nov 2008 |
| C*** P*** | Director | Nov 2008 |
| C*** S*** | Director | Nov 2008 |
7 former officers
| Name | Role | Appointed | Left |
|---|---|---|---|
| A*** C*** | Secretary | May 1993 | |
| J*** C*** | Secretary | May 1993 | Nov 2008 |
| A*** C*** | Director | May 1993 | |
| J*** C*** | Director | May 1993 | Nov 2008 |
| P*** C*** | Director | Nov 2008 | |
| C*** H*** | Director | Feb 2002 | Dec 2005 |
| C*** S*** | Director | May 1993 | Aug 1996 |
People with significant control (3)
Charges (secured borrowing)
1 of 7 registered charges are outstanding. A charge is security a lender takes over a company's assets, typically for a loan, mortgage or asset finance.
| Lender | Status | Registered |
|---|---|---|
| National Westminster Bank PLC | Outstanding | Jun 2010 |
| National Westminster Bank PLC | Satisfied Mar 2026 | Jan 1999 |
| National Westminster Bank PLC | Satisfied Mar 2026 | Dec 1998 |
| Monmouthshire Building Society | Satisfied Jul 1999 | Jun 1996 |
| Lloyds Bank PLC | Satisfied Jun 1996 | Mar 1995 |
| Close Brothers Limited | Satisfied Mar 1995 | Jun 1993 |
| Close Brothers Limited | Satisfied Dec 1994 | Jun 1992 |
Public contracts won
Marton (Civil Engineering) Limited has one public sector contract award on record; the ones with their own published value total £34K (2026). Source: Contracts Finder and Find a Tender award notices. These were matched by the company's exact name because the notice gave no company number.
| Buyer | Contract | Value | Awarded |
|---|---|---|---|
| Cyngor Bwrdeistref Sirol Merthyr Tudful Merthyr Tydfil County Borough Council | Gwaith Brys Capel Seion Zion Chapel Emergency Works | £34K | 6 Aug 2026 |
Where Marton (Civil Engineering) Limited is registered
The registered office is in Mountain Ash (CF45), in the Rhondda Cynon Taf local authority area, Wales. Show CF45 4SN on a map.
Other trade companies in CF45
- Pro Guard Home Improvements LtdRoofers
- Smiths Rendering & Resin LtdBuilders
- Ironrootslandscaping LimitedLandscapers and gardeners
- Lee Griffiths Contractors LimitedFinishing trades
- Theglossboss LtdCleaning companies
- Brickzen Constructions LtdInstallers
- STR Drylining LtdBuilders
- Greenvoltinfrastructure LtdCivil engineering
Also registered at this address
2 other companies use the same registered office as Marton (Civil Engineering) Limited.
- Absolute Vans LtdMotor traders
- I Fix Reinforcements LtdCivil engineering
What happens if Marton (Civil Engineering) Limited files late
Companies House charges an automatic penalty the day after the deadline, and it rises the longer the accounts are late. These are the dates for this company's accounts due on 31 January 2027.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 1 Feb 2027 to 28 Feb 2027 | £150 |
| 1 to 3 months late | 1 Mar 2027 to 30 Apr 2027 | £375 |
| 3 to 6 months late | 1 May 2027 to 31 Jul 2027 | £750 |
| More than 6 months late | From 1 Aug 2027 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 May 2027 | £200 |
| 3 months late | 30 Jul 2027 | another £200 |
| 6 months late | 30 Oct 2027 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 30 Apr 2028 | another 10% of any unpaid tax |
For returns filed on or after 1 April 2026. Late three times in a row and the £200 penalties become £1,000 each.
Company details
As held on the Companies House register.
- Company number
- 01276520
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 9 September 1976 (50 years ago)
- Registered office
- Ty Cynon Navigation Park, Abercynon, Mountain Ash, Mid Glamorgan, CF45 4SN
- Nature of business
- Construction of roads and motorways (SIC 42110)
Construction of bridges and tunnels (SIC 42130)
Construction of water projects (SIC 42910)
Construction of other civil engineering projects n.e.c. (SIC 42990) - Year end
- 30 April (accounting reference date)
- Accounts type
- Total exemption (full)
- Last accounts made up to
- 30 April 2025
- Last confirmation statement
- 8 January 2026
- Charges (mortgages)
- 1 outstanding of 7 registered
Filing notes for civil engineering contractors
Civil engineering contractors usually carry plant and machinery, so capital allowances (the annual investment allowance and the main pool) do much of the work in the corporation tax computation.
Similar companies in Mountain Ash
Other active civil engineering contractors registered in Mountain Ash.
- MDF Rail Limited2016
- Prizm Engineering Ltd2025
- R Lewis Rail Services Limited2014
- Air Jointing Limited2026
- C&M Jones Groundworks Limited2020
- Dan Rail Welding Ltd2020
- DSR Groundworks Ltd2015
- Evanhalli Ltd2019
All civil engineering contractors in Mountain Ash · All trades in Mountain Ash · Civil engineering across the UK
Frequently asked questions
When are Marton (Civil Engineering) Limited's accounts due?
Marton (Civil Engineering) Limited's next accounts are due at Companies House by 31 January 2027 (in 110 days), covering the period to 30 April 2026.
When is Marton (Civil Engineering) Limited's CT600 due?
The CT600 for the period to 30 April 2026 is due at HMRC by 30 April 2027, 12 months after the period end. The corporation tax itself is payable earlier, by 1 February 2027.
Is Marton (Civil Engineering) Limited still trading?
Marton (Civil Engineering) Limited is listed as active on the Companies House register as of 1 Oct 2026. Active means it has not been dissolved or entered insolvency; it does not show whether it is currently taking on work.
What does Marton (Civil Engineering) Limited do?
Marton (Civil Engineering) Limited is registered under Construction of roads and motorways (SIC 42110); Construction of bridges and tunnels (SIC 42130); Construction of water projects (SIC 42910); Construction of other civil engineering projects n.e.c. (SIC 42990).
How old is Marton (Civil Engineering) Limited?
Marton (Civil Engineering) Limited was incorporated on 9 September 1976, 50 years ago.
Who runs Marton (Civil Engineering) Limited?
Marton (Civil Engineering) Limited has 3 active directors, the longest-serving appointed in Nov 2008. Their names and service addresses are on the Companies House register.
Who owns Marton (Civil Engineering) Limited?
3 people or companies have significant control of Marton (Civil Engineering) Limited: an individual (has significant influence or control); an individual (has significant influence or control); an individual (has significant influence or control).
Has Marton (Civil Engineering) Limited won public sector contracts?
Yes. Marton (Civil Engineering) Limited has one contract award from public bodies on Contracts Finder and Find a Tender (those with their own published value total £34K), most recently from Cyngor Bwrdeistref Sirol Merthyr Tudful Merthyr Tydfil County Borough Council.
What is the penalty if Marton (Civil Engineering) Limited files its accounts late?
Companies House charges £150 if the accounts are up to 1 month late, £375 up to 3 months, £750 up to 6 months and £1,500 after that, doubled if the previous year's accounts were also late. HMRC charges £200 for a CT600 filed a day late and another £200 at 3 months.
Official records
View Marton (Civil Engineering) Limited on Companies House for filed documents, officers and the full history.
Based on the Companies House register (snapshot 1 Oct 2026). Deadlines are worked out from the register and assume a standard accounting period; a change of year end or a short period moves them. This page is general information, not tax or accountancy advice.